The upper house of Russia`s parliament voted Wednesday to revoke a resolution approving military intervention in Ukraine at the request of President Vladimir Putin even as Ukrainian President Petro Poroshenko Wednesday revealed a plan for the country`s decentralisation of powers.

Ukraine`s new Western-backed president said on Tuesday he may revoke his one-week unilateral ceasefire to allow government forces to retaliate for the downing by pro-Russian rebels of an army helicopter that killed nine servicemen.